《建设工程安全生产管理条例》规定，施工现场应为从事危险作业的人员办理意外伤害保险，意外伤害保险费由( )支付。

A．建设单位

B．施工单位

C．监理单位

D．承包单位

Salesperson A’s compensation for any week is $360 plus 6 percent of the portion of A’s total sales above $1,000 for that week. Salesperson B’s compensation for any week is 8 percent of B’s total sales for that week. For what amount of total weekly sales would both salespeople earn the same compensation ？（）

A．$21,000

B．$18,000

C．$15,000

D．$4,500

E．$4,000